Low-Energy X-ray Emission from Young Isolated Neutron Stars
Abstract
A young neutron star with large spin-down power is expected to be closely surrounded by an e+/- pair plasma maintained by the conversion of gamma-rays associated with the star's polar-cap and/or outer-gap accelerators. Cyclotron-resonance scattering by the e- and e+ within several radii of such neutron stars prevents direct observations of thermal X-rays from the stellar surface. Estimates are presented for the parameters of the Planck-like X-radiation which ultimately diffuses out through this region. Comparisons with observations, especially of apparent blackbody emission areas as a function of neutron star age, support the proposition that we are learning about a neutron star's magnetosphere rather than about its surface from observations of young neutron star thermal X-rays.
Cite
@article{arxiv.astro-ph/0310777,
title = {Low-Energy X-ray Emission from Young Isolated Neutron Stars},
author = {M. Ruderman},
journal= {arXiv preprint arXiv:astro-ph/0310777},
year = {2007}
}
Comments
10 pages, 5 figures, in 4th AGILE Science Workshop, "X-ray and Gamma-ray Astrophysics of Galactic Sources," 2003 June 11-13, Rome